Chelating polyacrylonitrile beads for removal of lead and cadmium from wastewater

Bhunia, Prasenjit; Chatterjee, Somak; Rudra, Pritam; De, Sirshendu

doi:10.1016/j.seppur.2017.11.001

Cited by 87 publications

(23 citation statements)

References 47 publications

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“…The percentage of carbon, hydrogen, nitrogen and sulphur of functionalized polymer noticeably increased, an indication that the thiourea was incorporated successfully. This increment is also buttressed by the FT-IR spectra (Figure 2); the conversion of dipolar-nitrile groups to TA-poly(AN- co -AA) networks, for active binding sites and selectivity in environmental applications [34,35]. Note that the C content is as expected (increased to 61.94%; after chemical modification with thiourea).…”

Section: Resultsmentioning

confidence: 66%

Adsorptive Removal of Methylene Blue from Aquatic Environments Using Thiourea-Modified Poly(Acrylonitrile-co-Acrylic Acid)

et al. 2019

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The paper evaluates the adsorptive potential of thiourea-modified poly(acrylonitrile-co-acrylic acid), (TA-poly(AN-co-AA)) for the uptake of cationic methylene blue (MB) from aquatic environments via a batch system. TA-poly(AN-co-AA) polymer was synthesized through redox polymerization and modified with thiourea (TA) where thioamide groups were introduced to the surface. Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), CHNS and Zetasizer were used to characterize the physico-chemical and morphological properties of prepared TA-poly(AN-co-AA). Afterwards, it was confirmed that incorporation of thioamide groups was successful. The adsorption kinetics and equilibrium adsorption data were best described, respectively, by a pseudo-second-order model and Freundlich model. Thermodynamic analysis showed the exothermic and spontaneous nature of MB uptake by TA-poly(AN-co-AA). The developed TA-poly(AN-co-AA) polymer demonstrated efficient separation of MB dye from the aqueous solution and maintained maximum adsorption capacity after five regeneration cycles. The findings of this study suggested that synthesized TA-poly(AN-co-AA) can be applied successfully to remove cationic dyes from aquatic environments.

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Section: Resultsmentioning

confidence: 66%

Adsorptive Removal of Methylene Blue from Aquatic Environments Using Thiourea-Modified Poly(Acrylonitrile-co-Acrylic Acid)

et al. 2019

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“…In contrast, the elimination efficacy of Cd 2+ was declined from 77% to 41.7% in the co-presence of Pb 2+ . The greater selectivity of Pb 2+ ions in the co-presence of Cd 2+ was discovered to be associated with the empathy/ attraction of the metals cations to the alginate carboxyl (-COOH) groups attached on/ in the BMMCs, as the affinity raised, so the removal efficiency was also increased (Bhunia et al, 2018). In the present work, Pb 2+ had higher affinity than Cd 2+ to crosslink with alginate carboxyl groups.…”

Section: Adsorptive Removal Of Potentially Toxic Metals Cations Usingmentioning

confidence: 52%

“…Potentially toxic metals (PTMs) in water and wastewater are conceived as the most significant pollutants, which are responsible for deteriorating aquatic and biotic environment, due to their carcinogenic, non-biodegradability, bioaccumulation and toxicity (Pourret 2018;Ali et al, 2019;Bhunia et al, 2018). PTMs cations (e.g.…”

Section: Introductionmentioning

confidence: 99%

Encapsulated green magnetic nanoparticles for the removal of toxic Pb2+ and Cd2+ from water: Development, characterization and application

Ali

Peng

Lin

et al. 2019

Journal of Environmental Management

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Current research is based on an innovative approach of the fabrication of encapsulated sustainable, green, phytogenic magnetic nanoparticles (PMNPs), to inhibit the generation of secondary pollutants (Iron/ Fe o) during water treatment applications. These novel bio-magnetic membrane capsules (BMMCs) were prepared using two-step titration gel crosslink method, with polyvinyl alcohol and sodium alginate matrix as the model encapsulating materials to eliminate potentially toxic metals (Pb 2+ and Cd 2+) from water. The development of BMMCs was characterized by FTIR, XRD, XPS, SEM, VSM, TGA and EDX techniques. The effects of various operating parameters, adsorbent dose, contact time, solution pH, temperature, initial concentration of metals cations and co-existing ions were studied. The hysteresis loops have illustrated an excellent super-paramagnetic nature, demonstrating the smooth encapsulation of PMNPs without losing their magnetic properties. The maximum monolayer adsorptive capacities estimated at pH 6.5 by the Langmuir isotherm model were 548 and 610.67 mg/g for Pb 2+ and Cd 2+ , respectively. The novel BMMCs did not only control oxidation of PMNPs but also sustained the adsorptive removal over a wide range of pH (3-8), and the electrostatic interaction and ion-exchange were the core adsorption mechanisms. The BMMCs could easily be regenerated using 25% HNO3 as an eluent for successful usage in seven repeated cycles. Therefore, the BMMCs as a material can be used as an excellent sorbent or composite material to remove toxic metals Pb 2+ and Cd 2+ , showing strong potential for improving water and wastewater treatment technologies.

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“…mercury, cadmium, lead, chromium, arsenic, zinc, copper, nickel, cobalt is non-biodegradable and causing organs damage [1][2][3]. Lead is very important elements in body metabolism at limited concentration, but, at over limit concentration it can be toxic and can cause bad effects to many biological and biochemical processes [4][5][6]. The heavy metals which directed to water resources may produce from industrial wastewater such as batteries, refining ores, alloy, electronics and elec-troplating.…”

Section: Introductionmentioning

confidence: 99%

Detection and removing of lead from wastewater using chemical treatment of polyurethane foam waste: Batch and column experiments

Moawed¹,

El-Hagrasy²,

Kamal³

2019

Desalination and Water Treatment

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A new inexpensive sorbent was prepared from the waste of polyurethane foam (PUF) which highly surface polarity and sorption capacity. PUF was modified by adding amino, chloro and hydroxyl groups to its matrix. The polyamine polyhydroxy polyurethane chloride (PPPC) was characterized by using elemental analysis (EA), bulk conductivity (BC,σ), infrared/ultraviolet/visible spectra (IR/UV/Vis), pH point zero charge (pH ZCP), thermal analysis (TGA/DTA/DSC), scanning electron microscope (SEM) and X-ray diffraction (XRD). The PPPC owned improved stability in acidic/alkaline solutions and organic solvents. The pH ZPC of PPPC was 5.1 and the maximum values of ∆pH of PPPC are + 1.5 and-3.8 at pH 3.2 and pH 8.3. The σ of PPPC was 2.6×10-5 Ω-1 m-1. PPPC contains several active groups (NH 2 , Cl, OH, C=O, C=C, and CO -C) which classified as an effective sorbent for the solid-phase extraction (SPE) of Pb(II) ions from wastewater. The removing rate of the Pb(II) ions onto PPPC was very fast with half-life time (t 1/2) 1.13 min at pH range 3-7. The value of ∆Η for the sorption Pb(II) ions were-22.9 kJ/mol; these revealed that the values the extraction process is exothermic in nature. The recovery percentage of Pb(II) ions are 99-105% with relative standard deviation (RSD) 2.49% (n = 7).

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Chelating polyacrylonitrile beads for removal of lead and cadmium from wastewater

Cited by 87 publications

References 47 publications

Adsorptive Removal of Methylene Blue from Aquatic Environments Using Thiourea-Modified Poly(Acrylonitrile-co-Acrylic Acid)

Adsorptive Removal of Methylene Blue from Aquatic Environments Using Thiourea-Modified Poly(Acrylonitrile-co-Acrylic Acid)

Encapsulated green magnetic nanoparticles for the removal of toxic Pb2+ and Cd2+ from water: Development, characterization and application

Detection and removing of lead from wastewater using chemical treatment of polyurethane foam waste: Batch and column experiments

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